Drive for doctor oscillators



' July 9, 1935.

G. H. THOMSON ET AL 7, 89

DRIVE FOR DOC'fOR OSCILLATORS Filed April 10, 1931 2 Sheets-Sheet 1 6Wanda/1,.

y 1935- G. H. THOMSON ET AL 2,007,289

a DRIVE FOR DOCTOR OSCILLATORS Filed April 10, 1931 2 Sheets-Sheet 2cite Patented July 9, 1935 UNITED STATES PATENT OFFICE DRIVE FOR DOCTOROSCILLATORS Application April 10, 1931, Serial No. 529,152

3 Claims.

This invention relates to a drive for operating the oscillator orvibrator rod of a fabric color printing machine which longitudinallyvibrates the doctor blade for cleaning. the intaglio printing ro ls.

The principal object of this invention is to provide a simpler, lessexpensive, drive than has been used heretofore and which will take upless room. These doctor blade vibrators have been driven in a mannerheretofore which takes 7 up a good deal of space and involves theprovision of a number of gears and this invention, as stated, isdesigned chiefly to avoid the complications heretofore thoughtnecessary.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. l isa side view of a part'of a printing machine showing a preferredembodiment of the invention applied thereto; I

Fig. 2 is an end view showing this drive;

Fig. 3 is a side view of a modified form of drive for this purpose inwhich a motor is used,

Fig. 4 is an end view of the same, and Fig. 5 is a side view showing theconnections to the doctor blade.

Referring first to Figs. 1 and 2, it will be seen that the power shaftI0 is provided with a bearing block H carried on a bracket 9 which isadjustable through screws l2 on the frame I 3 of the printing machine.In order to transmit power from this shaftv to the blanket roll shaft M,a pair of sprocket wheels I5 and chain are employed directly from oneshaft to the other. This arrangement, of course, can be made to securethe desired relative rotation between the power shaft and theblanketroll shaft in a very simple manner and employs very few parts.

The cylinder I1 is indicated on which the blanket i8 is carried andwhich passes over the blanket .ro-ll E9 on the shaft l4 and over a pairof idler rolls 20. The blanket roll shaft I4 is mounted adjustably in afork 2i, an adjusting screw 22 being shown for adjusting it and securingit in adjusted position and the idler rolls are adjusted in a similarmanner. The bearing for one of the guide rolls 20 is also adjustedtoward and from the other by a screw shaft 25. This blanket roll I9 isloose on the shaft [4, not being driven by it.

The shaft M, which rotates constantly, is provided with an eccentricplate 26 and wrist-pin 21 carried eccentrically and adjustably thereby.The wrist-pin 21 has an eccentric hub 3| rotatably mounted on it. Thishub rotates eccentrically in a. box 32 which is adjustably connectedwith the vibrato-r rod 24. The eccentric rotation of the hub 35 in thebox 32 reciprocates the vibrator rod 24 which reciprocates the doctorblade 36 through well-known linkage 37.

In the form shown in Figs. 3 and 4, the mechanism is further simplifiedby providing a motor 30 which is indirectly coupled to the shaft M foroperating the rod 2 4. In some cases enough mechanism is eliminated bythis means to warrant the use of the motor. Furthermore by mounting theroll 19 rigidly on the shaft I4, the sprockets l5 and chain can beeliminated. In that case the roll I9 and shaft [4 are driven by theblanket. 7

Although we have illustrated and described only two forms of theinvention we are aware of the fact that other modifications may be madetherein by any person skilled in the art without departing from thescope of the invention as expressed in the claims. Therefore we do notwish to be limited in this respect but what we do claim is:-

1. In a device for operating the doctor vibrator rod of a textile colorprinting machine, the combination of a power shaft, a blanket rollshaft, a connection for directly driving the blanket roll shaft from thepower shaft, and means connected with the blanket roll shaft foroperating a doctor vibrator rod.

2. In a device for operating the doctor vibrator rod of a printingmachine, the combination with a blanket roll shaft and a power shaft, ofa connection for directly driving the blanket roll shaft from the powershaft, means connected with the blanket roll shaft for operating adoctor vibrator rod, a bearing for supporting the end of the powershaft, a bracket on the frame of the machine carrying the bearing, andadjustable means for supporting said bearing from the bracket.

3. In a fabric color printing machine, the combination with a blanketroll, of a shaft on which said roll is rotatably mounted, a doctor, andmeans for vibrating the doctor from said shaft.

GEORGE H. THOMSON. STEPHEN B. STAFFORD. HERMAN A. SMITH.

